you know, I just realized that the lktdm tests use jprobes. I've not done any
testing in conjunction with k/jprobes. I'm not sure what effect they have on
kdump (obviously its nominally not a problem if other systems are unaffected).
Still, Do the lkdtm tests have a variant in which k/jprobes are unused, so we
have something to compare against?

Although this one seems made into the second kernel, while the other seems not,
they do look similar. I agree that we could just track BZ 441657, and then I
would retest and confirm it here if we have a fix there.